cri·te·ri·on

[krahy-teer-ee-uhn]
noun, plural cri·te·ri·a [-teer-ee-uh] , cri·te·ri·ons.
a standard of judgment or criticism; a rule or principle for evaluating or testing something.

Origin:
1605–15; < Greek kritḗrion a standard, equivalent to kri- variant stem of krī́nein to separate, decide + -tērion neuter suffix of means (akin to Latin -tōrium -tory2)

cri·te·ri·al, adjective

criteria, criterion (see usage note at the current entry).


measure, touchstone, yardstick. See standard.


Like some other nouns borrowed from the Greek, criterion has both a Greek plural, criteria, and a plural formed on the English pattern, criterions. The plural in -a occurs with far greater frequency than does the -s plural: These are the criteria for the selection of candidates. Although criteria is sometimes used as a singular, most often in speech and rather infrequently in edited prose, it continues strongly in use as a plural in standard English, with criterion as the singular.
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Based on the Random House Dictionary, © Random House, Inc. 2013.
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00:10
Criteria is always a great word to know.
So is gobo. Does it mean:
a screen or mat covered with a dark material for shielding a camera lens from excess light or glare.
a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison.
Collins
World English Dictionary
criterion (kraɪˈtɪərɪən) [Click for IPA pronunciation guide]
 
n , pl -ria, -rions
1.  a standard by which something can be judged or decided
2.  philosophy a defining characteristic of something
 
usage  Criteria, the plural of criterion, is not acceptable as a singular noun: this criterion is not valid; these criteria are not valid

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Etymonline
Word Origin & History

criterion
1660s, from Gk. kriterion "means for judging, standard," from krites "judge."

criteria
1620s, plural of criterion (q.v.).
Online Etymology Dictionary, © 2010 Douglas Harper
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Example sentences
In an effort to quantify the design criteria for such a device is, in and of
  itself a noteworthy task.
Criteria include strength of schedule, quality of wins and players.
Less than one-third of countries meet simple criteria for reducing speed on
  city roads.
Besides staging games that are exciting and safe, three criteria will determine
  how well it does.
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